| 摘要 |
<p>High-intensity magnetic separator comprising a rotor consisting of a stack of polar pieces (22) and permanent magnets (20), which are ring-shaped and arranged alternately on a shaft.
<??>In order to increase the lifetime of the rotor without substantially reducing its performance, the magnets (20) are coated on the periphery with a layer of a ceramic material whose thickness is less than 50 mu m.
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